Hi I've been using this program and I would like to know if the program will ever be able to contact students to indicate problems or communicate with students.
Also, to send students back to a module if they didn't do so well on it.
I'm not sure if Duolingo will implement such things (at least any time soon). Indeed, to communicate with your school students, teachers have already the possibility to speak with their students during their ("real life") classes or by writing them an email (you can see the mail addresses in the Duo Schools interface). So not sure it'd be such an improvement so it'd be on top of staff's TO DO list.